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Iron Mountain
1,082 hedge funds and large institutions have $25.8B invested in Iron Mountain in 2026 Q1 according to their latest regulatory filings, with 176 funds opening new positions, 398 increasing their positions, 349 reducing their positions, and 88 closing their positions.
New
Increased
Maintained
Reduced
Closed
100% more first-time investments, than exits
New positions opened: 176 | Existing positions closed: 88
71% more funds holding in top 10
Funds holding in top 10: 7 → 12 (+5)
21% more capital invested
Capital invested by funds: $21.4B → $25.8B (+$4.44B)
14% more repeat investments, than reductions
Existing positions increased: 398 | Existing positions reduced: 349
8% more funds holding
Funds holding: 1,006 → 1,082 (+76)
2.13% less ownership
Funds ownership: 87.12% → 84.99% (-2.1%)
46% less call options, than puts
Call options by funds: $139M | Put options by funds: $259M
Holders
1,082
Holders Change
+76
Holders Change %
+7.55%
% of All Funds
13.32%
Holding in Top 10
12
Holding in Top 10 Change
+5
Holding in Top 10 Change %
+71.43%
% of All Funds
0.15%
New
176
Increased
398
Reduced
349
Closed
88
Calls
$139M
Puts
$259M
Net Calls
-$119M
Net Calls Change
-$163M
Top Buyers
| 1 |
Morgan Stanley
New York
|
+$105M |
| 2 |
AQR Capital Management
Greenwich,
Connecticut
|
+$91.8M |
| 3 |
Jane Street
New York
|
+$70.4M |
| 4 |
Goldman Sachs
New York
|
+$68.8M |
| 5 |
State Street
Boston,
Massachusetts
|
+$65.9M |
Top Sellers
| 1 |
Cohen & Steers
New York
|
-$272M |
| 2 |
Pictet Asset Management
Carouge,
Switzerland
|
-$142M |
| 3 |
CAM
Contour Asset Management
New York
|
-$138M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$74.1M |
| 5 |
Daiwa Securities Group
Tokyo,
Japan
|
-$54.4M |
